Index: kernel/generic/src/synch/smp_memory_barrier.c
===================================================================
--- kernel/generic/src/synch/smp_memory_barrier.c	(revision 0a597d707bb27afdd3896caa12842e6d2f884969)
+++ kernel/generic/src/synch/smp_memory_barrier.c	(revision 0a597d707bb27afdd3896caa12842e6d2f884969)
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2012 Adam Hraska
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup generic
+ * @{
+ */
+
+/**
+ * @file
+ * @brief Syscall implementation that issues a memory barrier on all cpus.
+ */
+
+#include <synch/smp_memory_barrier.h>
+#include <smp/smp_call.h>
+#include <config.h>
+
+
+static void issue_mem_bar(void *arg)
+{
+	/* smp_call already issues memory barriers on return from this function */
+}
+
+/** Issues a memory barrier on each cpu that is running a thread of the current
+ * task.
+ * 
+ * @return Irrelevant.
+ */
+sysarg_t sys_smp_memory_barrier(void)
+{
+	for (unsigned int cpu_id = 0; cpu_id < config.cpu_active; ++cpu_id) {
+		smp_call(cpu_id, issue_mem_bar, NULL);
+	}
+	
+	return 0;
+}
+
+/** @}
+ */
Index: kernel/generic/src/syscall/syscall.c
===================================================================
--- kernel/generic/src/syscall/syscall.c	(revision c0c26ac0de18c254bbce5fef8c6dbbbf0dbca479)
+++ kernel/generic/src/syscall/syscall.c	(revision 0a597d707bb27afdd3896caa12842e6d2f884969)
@@ -50,4 +50,5 @@
 #include <synch/futex.h>
 #include <synch/smc.h>
+#include <synch/smp_memory_barrier.h>
 #include <ddi/ddi.h>
 #include <ipc/event.h>
@@ -140,4 +141,6 @@
 	(syshandler_t) sys_futex_wakeup,
 	(syshandler_t) sys_smc_coherence,
+	(syshandler_t) sys_smp_memory_barrier,
+	
 	
 	/* Address space related syscalls. */